It seems that the introduction of SkinnySleeves, those are the HydraSleeves designed specifically to fit 50 mm wells, has led to increased HydraSleeve use in Australia.
The following links were found by searching the internet for HydraSleeve news. Just like all of the other independent studies you see on our website; these are truly independent studies. We had no input whatsoever, administratively or economically that would influence any of the results you see in these links.
We are excited to share these 2 additional reports for HydraSleeve and No-Purge Groundwater Sampling studies.
The first item is a summary paper where they used HydraSleeves to compare no-purge, passive sampling to low flow sampling techniques. erm-aus-study.pdf
It covers the same type of study, "No-flow versus Low-flow", but there are more details, complete with comparison data and scatter plot charts showing the actual lab results from the two.
Important SpeedBag Instructions
Please see the very important instructions for retrieving SpeedBag HydraSleeves:
As a reminder, a sheet like this will be sent with every SpeedBag order.
A few months ago we introduced the new SpeedBag Hydrasleeve; here we will expand on the idea with more information.
The Speedbag (US Patent No. 9,726,013; 6,481,300; No. 6,837,120; others pending) is a new version of our standard HydraSleeve that minimizes drag down when placing the SpeedBag HydraSleeve in the well. The original SpeedBag was an altered standard 2-inch HydraSleeve. We now have added a new size to accommodate more sample volume. The new SpeedBag will now be a normal, stocked, inventory item, and immediately available - no waiting for custom assemblies to be manufactured.
New SpeedBag specs: 37 inches long and 1.75" O.D. when full; they will hold approximately 900 mls of sample volume.
No waiting! No equilibration time! Immediate retrieval! Purchase fewer weights for one job!
Save even more on your groundwater sampling programs!
The video seen below shows the effects of a (modified HydraSleeve) Speedbag on mixing in the water column when deployed in a 2-inch schedule 40 well.
The video illustrates the minimal mixing that occurs when a Speedbag is deployed and immediately recovered in a 2-inch schedule 40 well. The results confirm that the Speedbag can be deployed and recovered in a 2-inch schedule 40 well to collect a formation quality sample from the well screeen without waiting for the well to re-stabilize. Tests show that the SpeedBag will displace 1 inch of water when it is placed in the 2-inch, schedule 40 well (empty).
Speedbags collect the same kind of sample as a standard HydraSleeve - they both collect a whole water sample suitable for almost any analysis.
The SpeedBag will require an additional step when retrieving from the well. While the hole above the check valve allows water to flow freely past while the bag is being installed, it also does not allow for immediate full opening of the check valve on retrieval. Speedbags require activation of the check valve and oscillation during recovery. To pop open the check valve, please be sure to pull up hard 1 to 2 feet once on the tether, let the assembly drop back down to the starting point, REPEAT THIS PROCESS 4 TIMES, and then steadily recover the SpeedBag through the well screen to the surface.
Advantages to non-stop (in/out) sampling with no well equilibration time using the Speedbag:
For the first deployment at a new site, the user can collect the first sample using the Speedbag and then leave a fresh standard HydraSleeve or SpeedBag in the well screen to be recovered for the next round of sampling.
Immediate recovery will allow for significant time savings when conducting comparison studies. Just one trip to the well when comparing HydraSleeves to pumped samples.
Where budgets are tight one weight can be utilized to sample all wells. There is no need to have one weight per well; simply decontaminate the same weight and reuse it for all of the wells.
The in/out method utilitzed with the Speedbag reduces sample turbidity. It only collects sediment that is suspended in the sample zone at the time of collection. This eliminates the accumulation of in-well sediment on top of the sampler over time.
A smaller 500 mls (the original) SpeedBag is still available for smaller sample volumes
Either of these SpeedBags can be easily shortened to recover less sample volume. There is even a weld mark along the side of the 900 mls SpeedBag which marks the size needed to collect 500 mls of sample. See instructions on shortening any HydraSleeve by clicking here. Note: A shorter bag means less drawdown.
Limitations
Currently the minimum well diameter is 2-inch schedule 80 with a maximum sample volume of about 900 mls.
Reminders
Has only been tested using a 2-inch Speedbag; has not been tested for 4-inch units. (However, you can use this in/out method with any 2-inch, bottom-weighted HydraSleeve in a 4-inch well and immediately recover the sample without mixing, just remember to oscillate the HydraSleeve on recovery.)
When using the SpeedBag you must pull up hard 1 to 2 feet once on the tether to pop open the check valve; let the assembly drop back down to the starting point, repeat this process 4 times, and then steadily recover through the well screen to the surface.
The Speedbag is not intended for any top-weighted configurations.
The SpeedBag can also be shortened for less sample volume or shorter saturated screens.
The SpeedBag should be cycled up and down (in addition to the initial pull to activate the check valve) to collect samples in short water columns.
Cost for the new Speedbag (US Patent No. 6,481,300; 6,837,120; others pending) will be $35. Reusable 7 and 8-ounce bottom weights to be used with this set up are $25 and $22 each respectively. The lighter weight is more expensive because it is tapered and requires additional machining. Spring Clips ($3.00) must be used with the Speedbag. After decontamination, the weight and clips can be moved from well to well if you so choose. The initial material cost to immediately retrieve 900 mls of sample volume using this set up will be about ~$60 - and much less if the cost of one weight is divided by the total number of wells on the site.
Please call 800-996-2225 orThis email address is being protected from spambots. You need JavaScript enabled to view it.l with questions.
How To Shorten HydraSleeves for Less Sample Volume
Many times the sample volume in a standard HydraSleeve can be more than needed for your analysis. Or, the well screen is too short to retrieve a full, sealed, HydraSleeve. For these times we can customize the HydraSleeves for you to shorten the sleeve. We charge $10 extra to customize HydraSeeves.
Or, follow these simple steps to shorten HydraSleeves in the field or your office.
First calculate the length you need. This is done by taking the length in inches and divide by the maximum amount of sample volume to calculate inches per mls.
The standard 2-inch HydraSleeve holds 600 mls max and it is 30 inches long. In this example we want to collect 300 mls. So:
30 inches/600 mls = 0.05 inch per mls
0.05 inch per mls x 300 mls sample vol = 15 inches long
See table below for other example formulas to alter other HydraSleeves
HydraSleeve
Length
Divided by Max Vol
= in/mls
Times desired sample vol
=Desired length
HS-2
30"
600 mls
0.050 in/mls
400 mls
20 inches long
HS-2-1L
38"
1300 mls
0.029 in/mls
800 mls
24 inches long
SPEEDBAG
37"
900 mls
0.041 in/mls
500 mls
21 inches long
HS-4-2L
37"
3100 mls
0.012 in/mls
1000 mls
12 inches long
HSSS-1L
36"
1200 mls
0.030 in/mls
800 mls
24 inches long
HSTS-1L
38"
1000 mls
0.038 in/mls
800 mls
32 inches long
MINIMUM LENGTH IS 12 INCHES.
Using the first example above, to alter the standard HS-2 (600 mls) HydraSleeve to hold 300 mls, follow these steps:
1. Tie a knot at 15 inches along the length of the sleeve. We have found that using knots in HydraSleeves is an extremely reliable seal for the bottoms of the bags.
2. Leaving ~1-inch tail, cut off the excess.
3. Using a paper punch make a hole in 2 layers of the tail for an attaching point for the bottom weight. If a hole punch is not available, the hole can be cut out with scissors or just use the weight clip to poke through two layers of the tail.
You now have a 2-inch HydraSleeve shortened to 15 inches which will hold 300 mls.
Methods of HydraSleeve Retrieval
The most common method of HydraSleeve retrieval is the continuous pull method. You simply retrieve the HydraSleeve with one long upward motion at a rate of approximately 1 foot per second. This creates a core of water that enters the bag when it travels through the screen zone. When the bag is full, the check valve closes and allows no additional water into the bag.
Here we would like to discuss the other options which involve oscillating the HydraSleeve within the screen zone. These cycling methods allow the sleeve to fill in a shorter distance and can be used for sampling screens that are shorter than recommended for the continuous pull method.
Video demonstration of HydraSleeve cycling and bailer cycling
Some think that this will increase turbidity in your sample by stirring up the bottom the the well. While that may be true for a bailer, it is not what happens using a HydraSleeve. Please click on the image above to see a video demonstration that shows the difference between oscillating the HydraSleeve in a clear column with sediment in the bottom vs. the same experiment using a bailer.
There are two HydraSleeve cycling options - both of these are explained in our field manual as follows:
